Handle restore from phrase

lib/Cargo.toml

@@ -11,4 +11,4 @@ crate-type = ["staticlib"]
 [dependencies]
 libc = "0.2.58"
 lazy_static = "1.4.0"
-zecwalletlitelib = { path = "../../lightwallet/lightwalletclient/lib/" }
+zecwalletlitelib = { git = "https://github.com/adityapk00/zecwallet-light-cli", rev = "6dc22e4d74e9cec458d279d793477dea3bfe27e5" }

lib/src/lib.rs

@@ -72,6 +72,53 @@ pub extern fn litelib_initialize_new(dangerous: bool, server: *const c_char) ->
     return s_str.into_raw();
 }
 
+/// Restore a wallet from the seed phrase
+#[no_mangle]
+pub extern fn litelib_initialize_new_from_phrase(dangerous: bool, server: *const c_char, 
+            seed: *const c_char, birthday: u64) -> *mut c_char {
+    let server_str = unsafe {
+        assert!(!server.is_null());
+
+        CStr::from_ptr(server).to_string_lossy().into_owned()
+    };
+
+    let seed_str = unsafe {
+        assert!(!seed.is_null());
+
+        CStr::from_ptr(seed).to_string_lossy().into_owned()
+    };
+
+    let server = LightClientConfig::get_server_or_default(Some(server_str));
+    let (config, _latest_block_height) = match LightClientConfig::create(server, dangerous) {
+        Ok((c, h)) => (c, h),
+        Err(e) => {
+            let e_str = CString::new(format!("Error: {}", e)).unwrap();
+            return e_str.into_raw();
+        }
+    };
+
+    let lightclient = match LightClient::new_from_phrase(seed_str, &config, birthday) {
+        Ok(l) => l,
+        Err(e) => {
+            let e_str = CString::new(format!("Error: {}", e)).unwrap();
+            return e_str.into_raw();
+        }
+    };
+
+    let seed = match lightclient.do_seed_phrase() {
+        Ok(s) => s.dump(),
+        Err(e) => {
+            let e_str = CString::new(format!("Error: {}", e)).unwrap();
+            return e_str.into_raw();
+        }
+    };
+
+    LIGHTCLIENT.lock().unwrap().replace(Some(lightclient));
+ 
+    let c_str = CString::new("OK").unwrap();
+    return c_str.into_raw();
+}
+
 // Initialize a new lightclient and store its value
 #[no_mangle]
 pub extern fn litelib_initialize_existing(dangerous: bool, server: *const c_char) -> *mut c_char {

lib/zecwalletlitelib.h

@@ -7,6 +7,9 @@ extern "C" {
 
 extern bool   litelib_wallet_exists       (const char* chain_name);
 extern char * litelib_initialize_new      (bool dangerous, const char* server);
+extern char * litelib_initialize_new_from_phrase
+                                          (bool dangerous, const char* server, const char* seed,
+                                           unsigned long long birthday);  
 extern char * litelib_initialize_existing (bool dangerous, const char* server);
 extern char * litelib_execute             (const char* s, const char* args);
 extern void   litelib_rust_free_string    (char* s);

src/firsttimewizard.cpp

@@ -102,7 +102,7 @@ bool NewSeedPage::validatePage() {
     auto parsed = json::parse(reply.toStdString().c_str(), nullptr, false);
     if (parsed.is_discarded() || parsed.is_null() || parsed.find("result") == parsed.end()) {
         QMessageBox::warning(this, tr("Failed to save wallet"), 
-            tr("Couldn't save the wallet. Error") + "\n" + reply,
+            tr("Couldn't save the wallet") + "\n" + reply,
             QMessageBox::Ok);
         return false;
     } else {
@@ -112,6 +112,8 @@ bool NewSeedPage::validatePage() {
 
 
 RestoreSeedPage::RestoreSeedPage(FirstTimeWizard *parent) : QWizardPage(parent) {
+    this->parent = parent;
+
     setTitle("Restore wallet from seed");
 
     QWidget* pageWidget = new QWidget();
@@ -125,11 +127,25 @@ RestoreSeedPage::RestoreSeedPage(FirstTimeWizard *parent) : QWizardPage(parent)
 
 bool RestoreSeedPage::validatePage() {
     // 1. Validate that we do have 24 words
-    QString seed = form.txtSeed->toPlainText();
+    QString seed = form.txtSeed->toPlainText().replace(QRegExp("[ \n\r]+"), " ");
-    if (seed.trimmed().split(QRegExp("[ \n\r]+")).length() != 24) {
+    if (seed.trimmed().split(" ").length() != 24) {
         QMessageBox::warning(this, tr("Failed to restore wallet"), 
             tr("Zecwallet needs 24 words to restore wallet"),
             QMessageBox::Ok);
         return false;
     }
+
+    // 2. Attempt to restore wallet with the seed phrase
+    char* resp = litelib_initialize_new_from_phrase(parent->dangerous, parent->server.toStdString().c_str(),
+            seed.toStdString().c_str(), 0);
+    QString reply = litelib_process_response(resp);
+
+    if (reply.toUpper().trimmed() != "OK") {
+        QMessageBox::warning(this, tr("Failed to restore wallet"), 
+            tr("Couldn't restore the wallet") + "\n" + reply,
+            QMessageBox::Ok);
+        return false;
+    } else {
+        return true;
+    }            
 }

src/firsttimewizard.h

@@ -52,9 +52,12 @@ private:
 class RestoreSeedPage: public QWizardPage {
 public:
     RestoreSeedPage(FirstTimeWizard* parent);
+
 protected:
     bool validatePage();
+
 private:
+    FirstTimeWizard* parent;
     Ui_RestoreSeedForm form;
 };